This book summarizes and provides a detailed overview of the enhanced mechanical and functional properties of bulk nanostructured metallic materials with respect to their potential applications. These applications include nanostructured Ti-based materials in bio-medical engineering, Al alloys and Cu in electrical engineering and nanostructured steels in construction engineering. Moreover, this book describes the application of severe plastic deformation for the formation of hybrid metal systems from simple powders and solid metals for an enhancement in the functional properties of materials. Authored by global leaders in the field, this book will serve as a bridge between researchers and professionals engineering the newest nanomaterials.